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this procedure,
call our customer as-
sistance help line at 1-800-235-5878.
Old fuel, a dirty air filter, dirty fuel filter,
or flooding
may give the impression
of
an improperly
adjusted
carburetor.
Check these conditions
before adjust-
ing the carburetor.
The carburetor
has been carefully
set
at the factory. Adjustments
may be
necessary
if you notice any of the fol-
lowing conditions:
• Chain moves at idle. See IDLE
SPEED-T under adjusting
procedure.
• Saw will not idle. See IDLE SPEED-T
and LOW SPEED MIXTURE~L under
adjusting
procedure.
• Engine dies or hesitates
when it
should
accelerate.
See ACCELERA-
TION CHECK under adjusting
procedure.
• Loss of cutting power. See HiGH
SPEED MIXTURE ~ H under adjusting
procedure.
There are three adjustment
screws on
the carburetor. They are labeled
H, L,
and T. They are located in the area just
above the primer bulb.
ADJUSTING
PROCEDURE
CAUTION:
Do not force plastic limiter
caps on screws beyond the built-in
stops or damage will occur.
Initial Settings
1. Turn both mixture screws (L and H)
counterclockwise
until they stop.
2. Turn the idle speed screw (T)
clockwise
until it stops. Then turn it
counterclockwise
4 and 1/2 turns.
3. Start engine and let it run for 3 min-
utes, then proceed to adjust
screws according
to the instruc-
tions beIow.
If engine performance
at initial settings is acceptable,
no
further adjustments
are necessary.
If engine does not start, refer to the
TROUBLESHOOTING TABLE. If still
unable to remedy situation,
call
1-800-235-5878.
Idle Speed-T
Allow engine to idle. If the chain
moves, idle is too fast.
If the engine
stalls, idle is too slow. Adjust speed
until engine runs without chain move-
ment (idle too fast) or stalling (idle too
slow).
• Turn idle screw (T) clockwise
to in-
crease engine speed.
• Turn idle screw (T) counterclockwise
to decrease
engine speed.
Low Speed
Mixture-L
Allow engine to idle. Then accelerate
the engine and note performance.
If
engine hesitates,
bogs down, or
smokes during acceleration,
turn low
speed mixture screw (L) clockwise
in
1/16-turn increments
until performance
is satisfactory.
Repeat this procedure
as necessary
for proper adjustment.
After completing
adjustments,
check
for acceleration
and chain movement
at idle. Reset if necessary.
High Speed Mixture-N
DO NOT operate engine at ful! throttle
for prolonged
periods while making
ad-
justments.
Damage to the engine can
occur. Make a test cut. Based on per-
formance
of the saw while cutting, ad-
just the high speed mixture setting in
1/16-turn increments
as follows:
•Tum
the high speed mixture screw (H)
clockwise until saw has good power in
the cut with no hesitation. Do not ad-
just by sound or speed, but judge by
how well the saw performs in the cut.
• Turn the high speed mixture screw (H)
counterclockwise
if the saw has
speed, but dies in the cut or lacks
power in the cut.
After completing
adjustments,
check
for acceleration
and chain movement
at idle. Reset if necessary.
Acceleration
Check
If the engine dies or hesitates instead of
accelerating, turn the low speed mixture
screw (L) counterclockwise
until you
have smooth acceleration
with no chain
movement at idle.
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